ON SOME DIPLOPTERYGA FROM THE SOUTHWEST 

 OF NORTH AMERICA 



p. CAMBRON. 



Nortonia acanthopus Cam. 



A female of what is doubtless this species from Lee county, Texas, ( Uirk- 

 man), has an oblique longish mark or line on the top of the basal slope of 

 the first abdominal segment on the sides., and the mark on the sides of the 

 metanotum is larger and wider, covering the apical half of the sides. 



Ancistrocerus pilias Cam. 



A specimen of this species from the mountains near Claremont, California, 

 has the two large marks of the second abdominal segment of the type, united 

 into one broad yellow band ; the other markings are larger. 



Ancistrocerus howardi sp. nov. 



Black, the head and thorax covered densely with fuscous pubescence, the 

 clypeus except for a wide mark down the center of the upper half, a small 

 triangular mark on the base of the mandibles, a mark not much wider than 

 long over the antennae, a short line on upper part of outer orbits, a line on 

 the basal third of pronotum narrowed in the center, a broad line on the scutel- 

 lum roundly narrowed at the base and nearer the apex than the base of the 

 scutellum, postscutellum, a line on the apex of the first abdominal segment 

 broadly dilated backwards to the suture on the sides, a line all around on the 

 second and fourth, and one on the top of the fifth segment, the apices of the 

 femora broadly, and the tibiae, bright orange yellow; the tarsi rufofulvous; 

 the tegulae of a paler yellow, with a fuscous spot in the center. Wings hya- 

 line, the radial cellule smoky, the costa and nervures black, the stigma dark 

 fuscous. Female, length to end of second segment 8 mm. Lee county, Texas, 

 ( Birkman). 



Metanotum bordered all amund with a stout keel, there being alsn a keel 

 down the center ; the keels at the top curve down obliquely to unite with Ihe 

 central keel, at the sides below is a leaf-like expansion. Clypeus broad, pyri- 

 form, strongly punctured, the a])ex transverse, .\ntennal scape yellow except 

 above and there is a small yellow sjjot at its outer side; the flagellum is brown- 

 ish below. Base of thorax almost transverse, the sides rounded, not ])roject- 

 ing. Apex of postscutellum almo.st transverse. First abdominal segment 

 longish cup-shaped, the base triangular, ll;it, smooth and shining, the srmnd 



